First of all, in terms of the stepping accuracy of the photo machine, if the device can adjust the "step", you can set it, or perform the "compensation setting".
The other is the factor of printing paper media in the photo machine. Because different materials have different thicknesses, different weights, and different surface roughness, the friction coefficient is different, so the resistance of the material is different, and the advancement is fast or slow, but the nozzle The running speed of the ink cart is the same; therefore, the compensation value correction is required during production, that is, the machine stepping parameters need to be carefully adjusted according to different materials.
In the printing process of the photo machine, the issue of the unwinding and unwinding of the printed paper media is to loosen the material in advance in the unwinding area to reduce the resistance of the roll material. During the production process, there will be two phenomena of shortening and elongation. This phenomenon has a lot to do with the tightness of the material. At the beginning, the material is relatively thick, the resistance is large, the picture is prone to shortening, and the picture is prone to "horizontal stripes". The material is getting thinner and thinner, and the picture is prone to elongated. The problem of lengthening or shortening has a great impact on the quality of the inkjet image picture product. For example, the splicing is not correct, the length of the framed picture is different, and the picture length after the board is different.
Solution to the problem of shortening or lengthening of the painting surface of the photo machine:
1. Pay attention to the correctness of the size when designing and outputting the image screen of the photo printing. When importing pictures using the relevant RIP software, pay attention to keeping the original size of the image unchanged to avoid changing the actual size of the image due to the reduction of the image size during import and the recognition operation.
2. For customers with high size requirements, production process meetings must be held to ensure that production-related links are highly valued. The printing typesetting file can not be too long. The stepping parameters of the printing printing machine should be adjusted well, and it is required to be controlled within three meters.
3. For small-format advertising posters that need to be die-cut, because customers are extremely sensitive to size or patterns, they must be strictly prevented from being stretched or shortened. The correctness of parameters must be tested before production and random inspections must be strengthened.
Do careful inspection, rigorous operation and printing production, as far as possible to reduce irrelevant errors that affect the size of the printer's printing output.